JPS5815165Y2 - Kiyushi Souchi - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a paper feeding device applied to a copying machine, a printing machine, or the like.

In a paper feeding device, a means for stacking a large number of sheets of paper in a supply chamber and sending out one sheet at a time from the topmost sheet one by one using a feed roller is such that when the number of sheets in the supply chamber decreases, the take-out position is lowered and Since the contact pressure against the delivery roller becomes weaker, it is necessary to gradually raise the position of the uppermost sheet according to the number of sheets to be taken out.

On the other hand, in this type of paper feeding device, a pair of separation claws are provided at the front upper part of the supply chamber to suppress the front end corners of the paper as a means to prevent double ejection. Although a sufficient separation effect could be achieved by using only one solvent, a double extraction phenomenon was sometimes observed.

The present invention has been devised in view of these points, and its purpose is to provide a paper feeding device that has a relatively simple configuration and yet can prevent the phenomenon of double paper ejection as much as possible. There is a particular thing.

Hereinafter, one embodiment of the present invention will be described based on the drawings.

FIG. 1 shows the entire paper feeding device, and 1 is the main body of the paper feeding device, and inside this main body 1 is a paper feeding chamber 3 that stores paper 2. is formed.

A large number of sheets of paper 2 are stacked at the inner bottom of the paper supply chamber 3.
A paper mounting plate 4 is provided on which... is placed.

A protrusion 5 is formed at the middle part of the bottom surface of the paper placement plate 4, and the protrusion 5 is inserted and locked into a corresponding groove 6 formed on the inner bottom surface of the paper supply chamber 3. ing.

In other words, the paper mounting plate 4 is configured such that its front and rear ends can be swung up and down alternately with the fulcrum 7 being at the position where the protrusion 5 and the groove 6 engage with each other.

Further, the protrusion 5 is provided so as to be shifted rearward from the center of the paper placement plate 4 in the front-rear direction.

Therefore, in a normal state, the front end tilts downward and stops when the leading end touches the inner bottom surface of the paper supply chamber 3.

Further, the upper and rear sides of the paper supply chamber 3 are open, and a take-out roller 8 is provided above the paper supply chamber 3.

The take-out roller 8 is supported so that it can move up and down, and when the paper 2 is taken out, it descends and comes into contact with the paper 2 on the paper placement plate 4. ing.

Further, the contact position with respect to the paper 2 is set in front of the fulcrum 7 of the paper mounting plate 4.

However, if paper 2... is stacked on the paper stacking plate 4 and left alone, the front side of the paper stacking plate 4 has a heavy weight, so the front part will tilt downward, causing the paper 2...
.

The front inner wall 9 of the paper supply chamber 3 is inclined so that its upper end portion protrudes forward.

The inclination angle θ of the front inner wall 9 is set to be large enough to cause the sheets 2 pressed against each other to shift from each other and receive a peeling action.

Note that an elastic material 10 is pasted on the surface of the front inner wall 9.

In addition, paper supply chambers 3 are provided at both upper corners of the front inner wall 9.
A pair of separation claws 11, 11 protruding from the upper surface of the sheet 2 are provided to hold down both corners of the front end of the uppermost sheet 2.

Further, a feed roller 1 for feeding the paper 2 taken out by the take-out roller 8 is located in front of the take-out end side of the paper supply chamber 3.
2 and a guide plate 13 are provided.

On the other hand, a push plate 14 whose lower end is pivoted to the main body 1 is provided at the rear opening of the paper supply chamber 3, and this push plate 14 pushes down the rear end of the paper placement plate 4. , so that the rear end surfaces of the sheets 2 stacked on the sheet mounting plate 4 can be pressed forward.

That is, the push plate 14 is biased by a screw spring 16 wound around the pivot shaft 15 so that its upper end portion rotates forward.

Further, the push plate 14 is set to be inclined in the same direction as the inclination of the front inner wall 9 of the paper supply chamber 3 when it hits the rear end of the paper placement plate 4, so that the pushing plate 14 2...
When pressed forward by the push plate 14, they are sandwiched between the front inner wall surface 9 and thereby shifted from each other.

Note that the pressing plate 14 has an elastic material 17 on the side surface.
is attached.

Next, a method of using the paper feeding device having the above configuration will be explained.

When loading paper 2, etc., the push plate 14 is tilted rearward and retreated to the rear of the paper supply chamber 3, as shown in FIG.

While maintaining this state, the paper sheets 2 are stacked on the paper mounting plate 4 which had been removed, and then loaded into the paper supply chamber 3.

In other words, since the paper placement plate 4 is detachable from the paper supply chamber 3, the paper 2...
... can be stacked on the paper mounting plate 4.

However, it is possible to load the paper even when the paper mounting plate 4 is installed in the paper supply chamber 3.

Note that the take-out roller 8 is raised and retracted during this paper loading and thereafter until the start of the feeding operation.

When the paper 2... is stored in this way, the fulcrum 7 of the paper placement plate 4 is shifted backward, so the paper 2...
. . . and due to its own weight, the front end of the paper mounting plate 4 tilts downward as shown in FIG. 2, and the leading end of the paper mounting plate 4 hits the bottom wall of the paper supply chamber 3 and stops.

When the push plate 14 is released, the push plate 14 rotates forward due to the biasing force of the torsion spring 16 and hits the rear end of the paper placement plate 4 as shown in FIG. It hits the rear end surface of paper 2 on top of 4 and presses it forward.

In addition, at this time, as described above, since the push plate 4 is inclined in the same direction as the inclination of the front inner wall 9 of the paper supply chamber 3 and pressed against it, the front end of the paper loading plate 4 receives a rotational force that moves the front end upward. , paper 2, .

Furthermore, the rear end surfaces of the sheets of paper 2 are pressed forward by the push plate 14, so the front end surfaces of each sheet of paper 2 hit the front inner wall 9, and the front end surfaces of the sheets of paper 2 are pressed forward by the push plate 14. 14
hitting the surface.

Since the front inner wall surface 9 is inclined and the push plate 14 is also inclined at the same angle, each sheet of paper 2...
... are shifted from each other as shown in FIG.

Moreover, when the number of sheets of paper 2 is gradually removed, the paper placement plate 4 rotates around the fulcrum 7 accordingly, and the surface of the topmost paper 2 is separated by the separating claws 11. , the inclination angle of the front inner wall 9 and the push plate 14 with respect to the sheet stacking plate 4 becomes large, and the shearing effect on the stacked sheets 2 increases.

However, before taking out each paper 2...
Since the paper sheets 2 are displaced from each other and subjected to the separation action, when the paper sheets 2 are taken out by the take-out roller 8 while being subjected to the separation action of the pair of separation claws 11° 11 which hold down both front corners of the paper 2, it is possible to reliably take out each sheet one by one. I can do it.

The paper 2 taken out by the takeout roller 8 is transported while being guided by a feed roller 12 and a guide plate 13.

The take-out roller 8 descends each time in response to a take-out command, rolls into contact with the paper 2 on the paper placement plate 4, and takes out one sheet each time.

On the other hand, since the front inner wall 9 of the paper supply chamber 3 and the surface of the push plate 14 are each pasted with an elastic material 10.17, the clamping action for each paper is sufficient even if the two surfaces are not parallel to some extent. Can be repelled.

In addition, the same effect can be obtained even if the push plate 14 is formed so that it can be bent particularly elastically.

As described above, in the present invention, the front inner wall of the paper supply chamber is inclined to receive the front end of each paper.

An elastic material is attached to this front inner wall, and both ends of each paper are stacked and stored on a paper mounting plate that swings up and down.Furthermore, the rear end of each paper is A push plate is provided that presses down the rear end of the paper mounting plate and lifts the front end side.

Therefore, the front end of each sheet is not only pushed up, but also presses against the front inner wall of the sheet supply chamber, and the sheets are displaced from each other along the inclination thereof.

Furthermore, since the front inner wall surface is provided with an elastic material, a strong rubbing and peeling effect appears when each sheet is lifted one after another while keeping it tilted. Since the sheets are stacked together and the front end side is lifted each time the sheets are fed out, the above-mentioned displacement of the sheets increases as the number of sheets decreases, and from this point as well, the peeling effect can be enhanced.

In other words, when the number of sheets decreases, double take-out tends to occur frequently, but the above-mentioned effects can eliminate this tendency and ensure that even the last sheet can be taken out.

In addition, in the present invention, the front surface of the pressing plate is also provided with an elastic material, so that the rear end surface of the paper can be pressed elastically, so that the paper holding effect works effectively and the shifting effect due to the peeling action is achieved. In addition, the elastic material holds the trailing edge of the paper in place.
It is possible to feed out only the topmost sheet of paper.

Furthermore, in the present invention, since the push plate is made retractable, it is easy to insert the paper by retracting the push plate, and the paper can be loaded without touching the separating claw, which is convenient for use. It's good.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, in which Fig. 1 is a partially cutaway perspective view of the feeding device, Figs. 2 to 4 are sectional views showing the order of the ejecting operation, and Fig. 5. 6 is an explanatory diagram of the mutual separation action of sheets, and FIG. 6 is an explanatory diagram of the configuration of the urging means for the push plate. 1...Main body, 2...Paper, 3...
...Paper supply chamber, 4...Paper placement plate, 7...
...Fully point, 8...Take-out roller, 9...
...Anterior inner wall.

Claims (1)

[Scope of utility model registration request] It has an inclined front inner wall that receives the front end surface of the sheets stored in a stack, separation claws that hold down both front corners of the topmost sheet of the sheets, and a take-out roller arranged above. a paper supply chamber, a paper placement plate supported with an intermediate portion as a fulcrum in the paper supply chamber and capable of vertically swinging at both ends in the front and back direction; and a paper placement plate that presses against the rear end of the paper placement plate. A retractable push plate that pushes down the rear edge and presses the rear end surface of the paper to press the front end surface of the paper against the front inner wall to cause mutual displacement between the sheets, and a push plate provided on the push plate and the front inner wall. A paper feeding device made of an elastic material.